--- old/src/java.desktop/windows/native/libawt/windows/awt_Toolkit.h	2015-08-04 14:43:06.655826500 +0300
+++ new/src/java.desktop/windows/native/libawt/windows/awt_Toolkit.h	2015-08-04 14:43:06.143775300 +0300
@@ -385,7 +385,8 @@
     static BOOL activateKeyboardLayout(HKL hkl);
 
     HANDLE m_waitEvent;
-    DWORD eventNumber;
+    volatile DWORD eventNumber;
+    volatile BOOL isInDoDragDropLoop;
 private:
     HWND CreateToolkitWnd(LPCTSTR name);